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Mercedes-Benz CLK320Model year report

1999 Mercedes-Benz CLK320 Problems

Complaints
18filed with NHTSA
Median mileage
69,494miles, 8 complaints with mileage
Recalls
1campaigns on record
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA crash rating
—overall rating starts with 2011 models
EPA fuel economy
21 mpgcombined, 3.2L 6-cyl RWD · 18 city / 26 hwy

Sources: NHTSA records for the 1999 Mercedes-Benz CLK320 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 18 consumer complaints for the 1999 Mercedes-Benz CLK320. The part named most often is engine cooling, with 5 complaints (28% of the total), followed by other or unknown (3) and visibility (3). 8 of the complaints include a mileage, and 13% of those were filed for vehicles with under 50,000 miles; the median is 69,494 miles. Of all complaints, 1 involved a crash, 1 a fire, according to the filers. NHTSA lists 1 recall campaign and 16 technical service bulletins for this model year. Engine cooling complaints overlap with 1 technical service bulletin filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Exterior lighting (1), Seats (1), Steering (1), Tires (1).

Example complaints

Engine cooling: “Dt: vehicle is burning oil. Dealer said they can't find the cause of the problem. Manufacturer has not been contacted yet. Independent mechanic stated that the vehicle was burning excessive oil, and recommended that the dealer or manufacturer look into it.”

NHTSA complaint #10126667, filed 2005-06, 76,000 miles

Visibility (wipers, defrost, mirrors): “Mercedes benz 1999 CLK320: the outside mirror on the driver's door has turned so dark, it is virtually black and the driver cannot see anything in it. This inability to see in this exterior side-view mirror is extremely dangerous. It probably is caused by changes in the coating that is supposed to either heat the mirror or dim it.”

NHTSA complaint #10293531, filed 2009-11, 60,000 miles

Mileage when problems were reported

13% of the 8 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 60,000 and 76,000 miles.

13%0–100%10–250%25–5038%50–7538%75–1000%100–15013%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (8 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 69,494 miles.

Complaints by year filed

Trend: stable. Complaints filed in the last 3 full calendar years are within 25% of the 3 years before.

4200042003200520092016
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 1999 Mercedes-Benz CLK320 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
CLK320 RWD3.2L 6-cyl5-speed automatic182621$3,900
CLK320 Cabriolet RWD3.2L 6-cyl5-speed automatic172520$4,100

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 1999 Mercedes-Benz CLK320 → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 16 on record; the latest 10 are shown.

See all 16 bulletins →

Other model years of the Mercedes-Benz CLK320

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20051269,8963—21—Not enough data
20041669,0003—20—Rising
20031945,5273—20—Falling
20021659,0000—20—Stable
20011590,0000—21—Falling
20001752,5000—21—Stable
19991869,4941—21—Stable

All Mercedes-Benz CLK320 model years

Frequently asked questions

How many NHTSA complaints does the 1999 Mercedes-Benz CLK320 have?

NHTSA recorded 18 consumer complaints for the 1999 Mercedes-Benz CLK320 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 1999 Mercedes-Benz CLK320 is reported most often?

Engine cooling is named most often, in 5 complaints (28% of the total), followed by other or unknown with 3.

Has the 1999 Mercedes-Benz CLK320 been recalled?

NHTSA lists 1 recall campaign for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 1999 Mercedes-Benz CLK320 get?

The EPA rates the 1999 Mercedes-Benz CLK320 (CLK320, 3.2L 6-cyl) at 21 mpg combined, 18 city and 26 highway, with an estimated annual fuel cost of $3,900 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 1999 Mercedes-Benz CLK320 reported?

Among the 8 complaints that include a mileage, the median is 69,494 miles and the middle half falls between 60,000 and 76,000 miles; 13% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.